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Commitments and contingencies (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Financial Instruments with Off-Balance Sheet Credit Risk |
|  | December 31,
|  | 2020 |  |  | 2019 |
Commitments to extend credit, excluding interest rate lock commitments |  | $ | 2,719,996 |  |  | $ | 1,086,173 |
Letters of credit |  | 67,598 |  |  | 19,569 |
Balance at end of period |  | $ | 2,787,594 |  |  | $ | 1,105,742 |
Schedule of Allowance of Credit Losses on Unfunded Commitments | The table below presents activity within the allowance for credit losses on unfunded commitments:
|  |  |  | For the Year Ended December 31,
|  |  |  | 2020 |
Balance at beginning of period |  |  |  | $ | — |
Impact of CECL adoption on provision for credit losses on unfunded commitments |  |  |  | 2,947 |
Increase in provision for credit losses from unfunded commitments acquired in business combination |  |  |  | 10,499 |
Provision for credit losses on unfunded commitments |  |  |  | 2,932 |
Balance at end of period |  |  |  | $ | 16,378 |
Schedule of Activity in the Repurchase Reserve | The following table summarizes the activity in the repurchase reserve:
|  |  |  | For the Year Ended December 31,
|  |  |  |  |  | 2020 |  |  | 2019 |  |  | 2018 |
Balance at beginning of period |  |  |  |  |  | $ | 3,529 |  |  | $ | 3,273 |  |  | $ | 3,386 |
Provision for loan repurchases or indemnifications |  |  |  |  |  | 2,607 |  |  | 362 |  |  | 174 |
Recoveries on previous losses |  |  |  |  |  | (208) |  |  | (106) |  |  | 3 |
Losses on loans repurchased or indemnified |  |  |  |  |  | — |  |  | — |  |  | (290) |
Balance at end of period |  |  |  |  |  | $ | 5,928 |  |  | $ | 3,529 |  |  | $ | 3,273 |

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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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